diff --git a/doc/glog.html b/doc/glog.html
index 0edaa66..699d2ce 100644
--- a/doc/glog.html
+++ b/doc/glog.html
@@ -543,6 +543,24 @@ setting GOOGLE_STRIP_LOG to 1 or greater removes
all log messages associated with VLOGs as well as
INFO log statements.
+
To enable the log cleaner: + +
+google::EnableLogCleaner(3); // keep your logs for 3 days ++ +And then Google glog will check if there are overdue logs whenever +a flush is performed. In this example, any log file from your project whose +last modified time is greater than 3 days will be unlink()ed. + +
This feature can be disabled at any time (if it has been enabled) + +
+google::DisableLogCleaner(); ++
Google glog defines a severity level ERROR, which is